Engraving.



I PATENTED NOV. 24, 1903.. N. s. AMSTUTZ.

ENGRAVING.

APPLICATION FILED JULY 24, 1901.

, N0 MODEL.

Wiinesse Miran TATES Tatented November 24, 1903.

NOAH S. AMSTUTZ, OF CLEVELAND, OHIO.

ENGRAVING.

SPEGIFIGA'IIQN forming part of Letters Patent No. 744,852, datedNovember 24, 1903.

Application filed July 24,1901. Serial No. 69,564. (No model.)

To all whom it may concern:

Be it known that I, NOAH S. AMsTUTZ, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in Engraving, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.

This invention relates to the art of engraving, and is especiallyapplicable to those methods of practicing this art wherein a yieldingmaterial is engraved by a pointed tool while said material is heldagainst a relief representation of the subject.

The object of the invention is to facilitate the operation of the tool,whereby greater accuracy and a more faithful record of the subject maybe obtained; and the invention consists in certain operations whichcontribute to these effects, all of which will be more fully describedhereinafter, and particularly set forth in the claims.

In the drawings I illustrate a suitable adaptation ofdevice for thepurposes named above.

Figure 1 represents, on an enlarged scale, a section through a subjectduring the engraving operation, the section being taken in the plane inwhich the tool is cutting. Fig. 2 represents a similar section taken atright angles to the first.

Referring to the parts by letters, A repre sents a regular surface,which may be plane or cylindrical and upon which may be secured in anysuitable manner a relief representation of the subject. This should bewhat is usually known as a carbon-print. As is well known, undulationsof the surface of such a print are incidental to variations in light andshade on the same, and I have indicated the outline of these undulationsat any point by the wavy line b.

Upon the print B rests a yielding sheet D of recording material, and acutting-tool C is placed adjacent thereto. This cutting-tool C is madeto pass progressively over the entire area of the print B, while it ismaintained at a constant distance from the surface A, and its point cutsinto the sheet D at any moment to a depth depending upon the elevationof the surface of the print B just beneath the said point. These cuts ofvarying depth are indicated at d d.

While the cutting operation is taking place i a I press the yieldingmaterial D at a point adjacent to the point of the tool 0 by means of asmall presser-foot E. This presser-foot is preferably formed with aconic'ally-poi'nted cap e, which may be of sapphire, and a spring 6operates to press this cap against the recording material. In thismanner the sheet D is constrained to conform closely to theconfiguration of the subject in the vicinity of the cutting-point, andan accurate reproduction or acrotom of the subject is produced.

It is of course immaterial what form of cutting-tool is used inconnection with the presserfoot. A rotary cutter could be used, andindeed the use of any form of cutter whatever would be within the scopeof this invention.

What I claim is- 1. The method which consists in disposing a flexiblematerial in undulations corresponding to a relief representation of thesubject, passing a tool across the surface of said flexible material,and pressing said flexible material adjacent to said tool, substantiallyas set forth. I

2. The method which consists in engraving a recording material Whilesuperposed upon a relief representation of the subject, andsimultaneously pressing said recording material adjacent to theengraving-tool, substantially as set forth.

3. The method which consists in superposing a recording material upon arelief representation of the subject, giving said recording material anda tool a relative progressive movement, and simultaneously pressing saidrecording material adjacent to said tool, substantially as set forth.

4:. The method of engraving which consists in engraving a yieldingmaterial while superposed upon a relief representation of the subject,and simultaneously pressing said yielding material with a sapphire pointnear the engraving-point, substantially as set forth.

In testimony whereof I affiX my signature in presence of two witnesses.

NOAH S. AMSTUTZ.

Witnesses F. D. AMMEN,

E. L. PARDEE.

